Telephone set



" v INVENTOR.

HERBERT FOBERGFELL ATTORNE May 8, 1945 H. F. oBERGl-ELL TELEPHONE SET Filed May so, 1942 4 sheets-sheet 2 FIGA Y mm E T Y N NF R EG. O Vm T WB M O F. Dln E B R E H May 8, 1945. H. F. OBERGFELL TELEPHONE SET Filed May so, -1942 4 Sheets-Sheet 3 INV EN I OR.

` HERBERT F. OBERGFELL,

May 8, 1945. H. F. OBERGFELL TELEPHONE sE'r l 4 sheets-sheet4 4 Filed May so, 1942' INVEN'OR. HERBERT F. oBERGFx-:LL

" ATTORNEY withstand a two-thousand foot Patented `May 8, 1945` i analisi TELEPHONE sE'r `Her-loert F.ObergfellgRiven-Forest;IIL, assigner to Automatic Electric Laboratories,iInc.,y Chicago,

`lill.;acorporation.of Delaware` ApplicationMey 30, 194g,;ser ial;No.;445;129 l -1a claims. l. (alarma-roo This invention relates in. general .to telephone sets arid .in particular to telephone sets for use `on'boardships. l u l The telephone set of thisinvention was de signed especiallyfor use` on shipsand inthe Navy, where it is `sulojectto rough usage and severe shocks.` `This .setwas also designed `to pound shock and still be in working order. l

The principal objectof the invention is to pro- `vide atteleplione setpapableof withstanding a severe shockA without` rendering the set `inoperative.

be dislodged `or -removedmfrom -ingnfalse operation :of theswitchlfiool;` contacts,

while `at theflsame'tirnethefuserr4 may -easily `remove suclt handset-from itsimounting in the nor-` `malluse-thereof.

Afeature ofthe invention relates to thetim;A

Another objectof `therinvention is to provide `amimproved lmounting means Lfor the handset l `.telephone ofthe set so that the handset will not its mounting "in l response to shocks or concussions thereby Acaus`-` f prises la metal 'base to 2.0

proved swttehhook `assembly forzoperating the l switchhook.switching contacts .inf combination with the shock-proof mounting arrangement.

V 4Other featureslrelate to the meansforlmount-z ing l'the remaining` apparatus of the telephone :set

l so as-.to withstand.severelzshoeks1andtormakethe l samesplasti-proof. l t

`llrie l above features. and others `not .specically `mentioned are illustrated in the accompanying .drawingsfcomprising Figs. 1 .to 9., inclusive;

l .Inthedra-wingsEigt 1|tillustratesa,trontview l of` the ksubstation therefrom. l l l l Fig...2,shows avsectionaltiew ontheline Af-A `of Fig.` 1 with the handset-added. l

seti with `the handset.. removed Figs 3 l shows. a. sectional View on the` linetB-B oiFig..1. l .y l l t Eig. ,4 shows `a partialrear View` to more. clearly `show thelocation of theswitchhook contacts and `actuating means therefor.

Fig. 5 shows a sectional .viewtofkpaigt .of the vpparatus .on `theline G-Clof Figi withthe switchhook contacts and actuating means l added in `order to showftheoperation which takesfplace Fig. `6 shows a sectional viewof Vpart of the apparatus .on thelineD-fD ofFig.. lwith, the `addition of thehandset .in its mounting-,lin order to show the normalposition-oflthe switchhook assembly and spring` contacts. t The, dotted.- lines indicate one or" the positions ...the-handset and switchhook assemhlymustpbe operatedfzitosbetore `when the. handset isrcmoved from its mounting.

yarmssto forma "T-shaped member `thesubstation set` `end` of casing -I` which upon removalprovide openingsfor connecting with conduitor cable containng'the tele- `phone line wires.` provided a terminal block @assembly 1.9 upon `.mented to the angle tending into the lbase .{Y I. l longitudinally almostnthe entire length .ofcthe :faceplate rand hasra. deeper depressionppointpor j .recesswatlf thanpzat il ascmaybe `readily seen "l, l the opening shown inl-Fig. :6. l

.the .handset can. .be removed fromits. mQunting.

img. 1,shows. a sectional View lon. the line. EwE

or` Fig. .1 with. the corte"spendingA .-sect'on,of the .transmitter housing of ...the handset v u .more clearly. show.. how the t `contours. ,off ...the re- .addedglto airline` memberjit. the oontonr lof .the transmit.-

ter housing to maintainthe handset. in. itsmount ,l

.lf-ig..A 3.` shows. `a section-al IView on. `the line-FTF of Fig. l with the corresponding sectionotthe receiverhousing] of the lhandset added .to `more. `clearly show howthe `member lit .this` housing the spring-actuatedfswitchliopk. plate. presses, the

contours of the .retaining in normal position when housing againstfits retaining member.

.Fig. 9 shows a perspective Viewoftheswitchhook-assembly and. spring contacts.

Referring tothe drawings-the casing I` comwhiehare Weldedthe metal formounting onthelwall. At thebottom Vare provided` screw jplugs "28 On the insidesof' casing VI` `is which theteleph-one `wires terminate for interconnection `with the substation apparatus; *On

theftop `of` casingL l` is mounted the ringer mech-` anism "139, the waterproof` clapper rod assembly` l 40, and ringer gongs A38.`

welded to the casi-ngi Il to form ashel formouint- A rubber gasket 35 isce- `iron3ll to `form a waterthe face plate-`3 isfastened I8 screwed into the tapped tight enclosure when by means of screws *holes lintheangle. iron-30 `of casing I`.

:The 'face Iplate' comprisesaflat Ametal plate Which has itsicentertportion depressed inwardly at 4 and 5 to form ia.depression,orrecessyex-` This depression extends inlFigs. '-6, 'Z Jand.i 8. l The.. depression is iongerithan the handset-.and or substantially thesame width as; the handset except Where it hasneen-l enlarged toc. provide space .f for mounting the callingfnevice l provided in the recess-5:r

A pair of `retaining `members 31 and 31 are fastened to thettop.` ofthe face platera? lbymeans of vscrews.25and-26.extendingxthru holes in the` yretaini-ng members `and. Vvscrewed intotthe tapp y.di holes in theface plate Svand're` iianges ,of the :nF-Fl'en` An "angle iron 30'is 4. One end of the shaft 8 extends thru a 2 inforcing metal strips |2 and I3; the strips I2 and I3 being welded to the face plate 3 before the holes are tapped. These retaining members 3| and 31 are in general cup-shaped and have an inner contour conforming fairly closely to the outer contour of the receiver and transmitter housings of the handset. The retaining members are positioned near the ends andabove the recesses 4 and 5' in the face plate and extend outwardly therefrom thereby forming a partial enclosure having an opening between the two retaining members 3| and 31 which is less than the overall length of the handset 4|. y

The retaining member 3| has reinforcing ribs 32 and the retaining member 31 has reinforcing ribs` 36 at the points where the receiver housing 42 and the transmitter housing 43 of the handset 4| normally engage their respective retaining members. This is fully shown in the cross sections shown in Figs. 7 and 8 where it will be seen that the inner contour of the retaining members at lines 33 and 34 conform to the contour of the handset' housings. These reinforcing ribs have been placed at this location toprevent bending or breaking of the retaining means at a time when thesubstation set is subjected to a heavy shock or concussion. The recesses 4 and 5' extending inwardly from the face plate 3 and the cup-shaped retaining members 3| and 31 provide a partial enclosure which is large enough to easily accommodate the handset and permit both longitudinal and radial movement of the handset into the deeper recess 4 even though the restricted openingl between the retaining members is less than the overall length of the handset. The recess 4 is deeper than the recess to permit both longitudinal and radial movement Aof the handset within the enclosure and to provide space for the switchhook plate 5D which controls the operation of the switchhook spring Contact assembly dependent upon whether the handset is in its mounting enclosure or removed therefrom.

An insulating block l1 is secured in the recessv 5 and is of the proper thickness to hold the transmitter housing 43 of the handset in engagement with its retaining member 31 and still permit removal and withdrawal therefrom as shown inFig. 7. A calling device 1 is also mounted in the recess 5' at the opening 1 shown in Fig. 6.

A stop member comprising the rod I4V and insulating sleeve I5 extends transversely across the 4 to guide the handset and kto prevent inward movement of the receiver housing 42 of the handset until the same has been longitudinally moved into the recess 4' far enough to allow the receiver housing 42 to clear the stop member |4|5. The metal rod |4 is secured to the side walls 4 by means of screws I6.

A switchhook assembly, shown in Fig. 9, is rotatably mounted on the side walls 4 by means of a shaft 8 extending'transversely thru the recess bushing (not shown) in the side wall 4 and is rotatably mounted thereto by means of washer I I and screw Il) screwed' into the shaft The center portion of shaft 8 located within the recess 4 has been notched to permit the curved switchhook plate 53 to be secured thereto by means of screws 53. Portion 5| of plate 50 has been flattened to nt snugly against the notched portion of the shaft 8. i The plate 50 is curved slightly to conform to Y `the contour of the receiver housing 42` as shown in'Fig. 8. An extension 52 on plate 50 is provided to limit the movement of plate 53 by spring 64 when the handset is removed from its mounting as shown in Fig. 5 where it is seen that this limiting extension 52 engages the curved portion 6 to y of spring limit further rotation of the shaft' .and inci dentally further operation of the switchhook switching contacts. The other end of shaft 3 extends thru a bushing (not shown) in the side wall 4 into the hollow space in the base casing I. This end of shaft 8 is also flattened and to this flattened surface the angular member 54 is secured by means of screws 55. A hole 51 is provided in one arm of member 54 for anchoring one end of spring 34. An insulating bushing 5B is pro vided on the other arm ofv member 54.k for contacting and operating the switchhook spring contacts.

The switchhook spring contact assembly comprises the usual stationary contact springs 59 and l actuating Contact springs 51. A heavy spring 53 is also provided in the spring assembly to nor mally maintain the actuating spring contacts 51 disengaged from contacts 53. IThis heavy spring 53 also prevents vibration of springs 51 when subjected to'extreme shocks or concussions. The contact spring assembly also comprises the usual metal plate 5|, insulators 63 separa-ting the adjacent springs, Vthe metal block 62 and screws (shown in Figs. 2, 4 and 6)v for securing this assembly to the block 62. The block 62 has tapped holes 63 into which screws I9, extending thru face plate 3, are screwed to fasten the spring assembly to the face plate. An angle iron 65vis welded to the wall 4 for anchoring the other end 64. The spring 64 is tensioned to rotate shaft 3 and thereby operate the switchhook contacts when the handset is removed from its mounting. v

A pair of condensers 10 and 14 (Fig, 2) are secured to the face plate 3. Metal bands 15 extend around condenser 14 and are secured to the metaltapped holes in the end members 32. The two side plates 8| are shaped to fit over the Bakelite ends of the induction coil and firmly hold the induction coil while the end members S2 t over a cut-away portion of the Bakelite ends of the induction coil as shown in Figs. 3 and 4.

An insulated terminal block 84 having terminals 85 for internal wire connections is secured to brackets 86 which are in turn secured togface plate 3 by means of screws 24. A bracket `81 is also providedv forfastening the telephone'cord (not sho-wn) which extends'thru the hole 21 in the face plate and which is looped in the U-shaped portion of the brackets 81.

When the handset 4| is in its mounting the spring-'actuated plate 5I) holds the handset against the retaining members 3| and 31 as shown in Figs56, 7 and 8. Due tothe retaining members 3| and31 and the stop member I4 and |5-the handset is retained ywithin the enclosure formed by the retaining members land recess 4 and 5 when the substation set is subjected to severe shocks or concussions such as exploding bombs or the 'ring of large guns.

In order to remove the vhandset from its enclosureA it` is first necessary to kmoverthe s handsets 41| i longitudinally by `moving :the receiver! portion. `42 i further into `the ytoptportion o'f the enclosure,

until thetransmitter-` portion-His clear of thefretaining member 3l and,` the receiver portiom42 is i 1beyond the stop member Ill-t5,` Afterlthis the receiver portion142 "is pushed furtherinto 1 the 1recess4l in a radial movement :until` the@ handset is Hin the position shownby the ldottedvlinesinlig. 6.

After this position is reached thelhandsetcan then v `be removed fromits mounting. i f l i i During the longitudinal and `1radialfmovement` of the'handset, the receiver portioniV offthehandset moves the `switchhool: plate 50uandmemben54to i the dotted line position; shownvinliignd` Asf the member 54` is moved awayfrom the `switching convtactsduring this movement the switching contacts `arenot actuated` until `the handset is completely removed from its i mounting as shown in Eig. i 5.

"Thesextensioni- 524 on plate 5!)A engages-the curved portion 6 tolimit'ffurtherwmovement ofwmember 54 andthe switchhookspringicontacts. i i 'In order to replace ,the handset in-its mountin the reverse @order ofumovements as above `set i forthl are required `dueto the openinggformedsby the retaining membersv 3l! and-31 such opening' l `beingless in lengthlthan. thellengthof 3the handset. The handset is first 4pushed `into the upper portionlof theenclosure, tormedby the retaining `member `3I-and` .recess 4', atantangle until the handsetos` in the positionqlshowrr` in ,dotted lines in Fig 6. `After this1movement,1the transmitter portion 43 is movedin a'radial movement into the i recessi, The hand pressure by theiuserimay now `be removediand` in response th'eretothe` plate 5U Vandspringtll moves the handsetld lito the position -shown `in full lines inrlig; `6 iwithlthertransmitter housing 43 engaging its` retaining member 31.l on line 341as shown inrFig. '7, andfthe receiver 'hous- `ing 42 engaging its retainingtmember :31 on` l-ine `33,as1shown in FiguB; `In thissposition the. retain-` .ing members* 3| `and 3l preventifoutward Vmovement of the handset and the stop members M515 t and *lili prevent inward movement of: thelhandset when subjectedto shocks; i i i l; A

From "the foregoingdescription it will beiseen that certain prescribed movements of the handset are necessary beforethe: sameV can be removed thru the restricted opening-inits` mounting and therefore a shock-proof mounting has been providedlto maintain the handset in its mounting and" to `prevent false `operation of the switchhook spring contacts due to shocks orconcussions. Whatis claimed is: I l. In a mounting for a telephone rece1ver,a

shockproof mounting means comprising a recess and retaining means for preventing dislodgement or removal of said receiver from its mounting in said recess in response to severe shock or concussion, means including saidv retaining means for requiring rst longitudinal movement and then radial movement of said receiver into said recess from said retaining means, and switchhook switching contacts operated only 1n response to the completion of said movements -of said receiver from said retaining means and recess.

2. In a mounting for a handset telephone, mounting means comprising a recess and a pair of retaining members for maintainingsaid handhandset telephone'fromone 'of said retaining 41 members andithen` radial "and backward longitudinal ymovements `of the` rest l of the 4handset telephonewfromsaid recess and-the other retaining member inremoving the handset telephone from its :mountinga set ot switchhookswitching con;-

tacts, and means for actuatirlig-saidI contacts only l `in response t0; said latterbackward longitudinal `Imovement `of the rmountingw i i d3.` In l a mounting `for` a handset `telephone,"

mounting means comprising arecessanda pair-0f i retaining-members* for` maintaining said handset s telephonet its mounting, means including 'said i retaining members i for requiring forwardv t longitudinal movement of: the `handset telephoneijnto lthe recess in order` toremove a portion ofthe handset telephone .fromione `1 of said retaining membersgfand `then radial `and backward longitudinal movements of the-restof the handsettele- `.phonei from said recessand the otherretaining t `memberin removing thehandsettelephone from `itsmounting, a setlof switchhook switchingconl .tactsand meanswhereby saidforward longitudii `inalfmovement of said handsetintofsaidrecess'is t ineffective toioperate-said contacts and saidbackward `longitueiinal movement of -theyhandset frcm `itsmounting-actuates said contacts.`

` before said receiver can Vbe manually removed n yifln :amounting for a `handset telephone,`

mounting meanscomprisinga recess and a pair-of t retaining'members` for` maintaining saidhandset ``telephone in itsmountingf means including said `retaining members` for requiring forward longitu-` dinal movement of `recess in orderto remove a portion ofthe handset the handset telephone intothe telephone from: one ot said retainingmembers and `said arm in the opposite direction towards said contacts in response tosaidlbackwardlongitudinalA `movement whereby said contacts arefopera-ted by said .armxwhen the handset is completelyremoved fromlits mounting.

1.5., A, mounting for a hand; telephone set A comprising t a hollow base, a face platesecured to said base and having a recessed portion extending within said baselfor receiving both the receiver t and transmitter portions of the handset, a shaft i pivoted in said face plate and extending thru l" said recessed portion into said hollow base, "a handset -actuated `lever located in said recessed portion and secured to said shaft; a member located in said hollow base and secured to said shaft, a spring fastened at plate .and at the other end actuating said shaft, lever means including said lever to said member for and member, and

the hand telephone set in said recessed portion.

set telephone in its mounting, means including said retaining members for requiringforward longitudinal movement of thehadset telephone into the recess in order to remove a portion of the prising a hollow base,

t 6. A mountingfor a hand telephone set coma face plate secured to said base within said base for receiving" both the receiver and transmitter portions of pivoted in said face plate said recessed portion into said hollow base, a handset actuated lever located in said recessed portion and secured to said shaft, a member 1ohandsetl telephone from its i one end to said face under tension from` said spring and shaft assembly for maintaining and havinga recessed portion extending the handset, a shaft and extending thru i pivoted in said face plate and extending thru4 said recessed portion into said hollow base, a

handset actuated lever located in said recessed portion and secured to said shaft, a member located in said hollow base and secured to said shaft,`a spring fastened at one end to said face plate and at the other end to said member foractuating said shaft, lever and member, means including said lever under tension from said spring and shaft assembly for maintaining the hand telephone set in said recessed portion, .and switchhook contacts secured to said face plate for actuation bysaid member when the handset is removed from said recessed portion.

8. A mounting for a hand telephone set comprising a hollow base, a face plate secured to said base and having a recessed portion extending Within said base for receiving' both the receiver and transmitter portions of the handset, spring-actuated switchhook assembly means located partly within said recessed portion and partly within said hollow base, and means including said last means for maintaining the hand f telephone set in said recessed portion.

9. A mounting fora hand telephone set com prising a-,hollow base, a face plate secured to said base and having a recessed portion extending within said basefor receiving both the receiver and transmitter portions of the handset, springactuated switchhook` assembly means located partly within said recessed portion and partly within said hollow base, means including said last means for maintaining the hand telephone set in said recessed portion, and switchhook switching contacts secured to said face plate for actuation by said assembly means when said hand telephone set is removed from said recessed portion.

10. A mounting for a hand telephone set com-A prising a hollow base, a face plate secured to vsaid base and having-a `recessed portionextendingl within said basefor receiving both the receiver and transmitter portions of the handset, spring-actuated switchhook assembly means located partly within said recessed portion and partly within said hollow base, manual replacement of said handset into said recessed portion operating said assembly means against spring tension, and means including said tensioned assembly 'means for maintaining said handset in said recessed portion.

11. A mounting fora hand telephone set comprising a hollow base, a face plate secured to said base and having'a recessed portion extending within said base for receiving both the receiver and transmitter portions of the handset, spring-actuated switchhook assembly means 1ocated partly Within said recessed portion and partly within said hollow base, manual replacement of said handset into said recessed portion operating said assembly means against spring tension, means including said tensioned assembly means for maintaining said handset in said recessed portion, and a stop located within said recessed portion necessitating longitudinal movement of said handset into said recessed portion against said tensioned assembly means before said handset can be removed from said recessed portion.

12. A mounting for a hand telephone set comprising a hollow base, a face plate secured to said base and having a recessed portion extending within said base for receiving both the receiver and transmitter portions of the handset, springactuated switchhook` assembly means located partly within said recessed `portion and partly Within said hollow base, manual replacement of said handset into said recessed portion operating said assembly meansagainst spring tension, means including said tensioned assembly means for maintaining .said hand-set in said recessed portion, a stop located Within Said recessed portion necessitating longitudinal movement of said handset into said recessed` portion against said tensioned assembly means before said `handset can be removed from said recessed portion, and switchhook switching contacts secured .to said face plate actuated by said assembly means in response to the removal and replacement of said handset in said recessed portion.

HERBERT F. OBERGFELL. 

